Stainless stee
Stainless stee201 series & mdash; Chromium nickel manganese austenitic stainless steel.
The content of chromium, molybdenum and nitrogen in local corrosion-resistant duplex stainless steel makes it have strong ability to spot corrosion and interstitial corrosion in oxidizing and acidic solutions.
.500 Series & mdash; Heat resistant chromium alloy steel.
SPHC—& mdash; In the first place, s is the abbreviation of steel, h is the abbreviation of hot heat, and C is the abbreviation of commercial. It generally represents hot-rolled steel plate and strip.
.. 18%), which is better than l and 317L in most environments.
Logistics cost: different delivery locations determine different transportation costs. The long-distance transportation cost should be 500 yuan per ton and the short-distance transportation cost should be about 300 yuan per ton.
The power supply with vertical external characteristics is adopted, and the positive polarity is adopted in DC (the welding wire is connected to the negative pole).
The inner and outer surfaces of steel pipes shall be free of cracks, folds, crazing, cracks rolling folds, delaminations and scabs. These defects shall be completely removed (except for pipes for machining). After removal, the wall thickness and outer diameter shall not exceed the negative deviation. Other minor surface defects that do not exceed the allowable negative deviation may not be removed.
As long as the steel type is selected correctly and maintained properly, stainless steel will not produce corrosion, corrosion or wear. Stainless steel is also one of the high-strength materials in metal materials for construction. Because stainless steel has good corrosion resistance, it can ensure that the structural components can maintain the integrity of engineering design. Chromium containing stainless steel also integrates mechanical strength and high extensibility and is easy to wear The processing and manufacturing of parts can be full
2B cold rolling shall be subject to heat treatment, pickling or similar treatment,Stainless steel pipe manufacturer, and then leveled to obtain appropriate gloss.
Quality assurance. 430— Ferritic stainless steel for decoration, such as automotive accessories. Good formability, but poor temperature resistance and corrosion resistance.
[(outer diameter wall thickness) wall thickness] 0.02491 = kg m (weight per meter)
·Oil and gas pipeline, heat exchanger and pipe fittings.
mdash; Martensitic precipitation hardening stainless steel.
new product.D-outer diameter (mm) as stainless steel pipe for reprocessing device, in order to reduce carbon content by vigorously welding chromium carbon compounds at affected parts, or silicon and phosphorus content in Nb steel. In addition, in order to improve the corrosion resistance of ULC steel, the steel industry with phosphorus content below 0.015% is manufactured. After 20 times of 65% boiling corrosion test, it is found that if the corrosion degree of the solution treated material is less than 0.1mm/a, 650 ℃ & times; The sensitized material for 2h has excellent corrosivity when the corrosion degree is less than 0.2mm/a.
Decorative stainless steel pipe: usually the outer wall is relatively bright, so its name is considered. Decorative stainless steel pipe is used for decorative purposes. The stainless steel pipe for general decorative purposes is relatively thin. Because it is different from the manufacturing process of stainless steel product pipe, the price also varies greatly. The general production process of decorative stainless steel pipe is ordinary welded stainless steel pipe. Guangdong stainless steel product pipe stainless steel product pipe: generally,Stainless steel braided belt, the surface of stainless steel product pipe is also a bright surface, and a small number of pipes with acid pickling industrial surface. As mentioned above, stainless steel product pipe belongs to the purpose of stainless steel products because the outer diameter size, mechanical properties, acid, alkali and corrosion resistance of stainless steel pipe are relatively good, Therefore, stainless steel pipes are generally used as anti-corrosion materials or hardware products in large-scale production enterprises. The production process of stainless steel pipes is one-time forming, and nitrogen protection is also added during welding.
From the perspective of metallography,Stainless steel cylinder with cover, because stainless steel contains chromium, a very thin chromium film is formed on the surface, which is separated from the corrosion resistance of oxygen invaded in the steel.
.Let PS be the external force at the yield point s and fo be the cross-sectional area of the sample, then the yield point & sigma; S = PS / fo (MPA) MPa is called MPa, equal to n (Newton) / mm (MPA = 106pa, PA: Pascal = n / M
(II) The price of steel has been running at a low level. From January 31 to June 2012, the overall performance of the domestic steel market was depressed. With the substantial release of crude steel production capacity, the market supply and demand fell into an imbalance, and the steel price entered a downward channel, which has been weak for more than four months. As of June 26, the steel price index had dropped to 100.48 points, lower than the first 6 points. The prices of eight steel varieties mainly counted by the iron and steel industry association were lower than the first 6 points
mdash; Martensitic precipitation hardening stainless steel.